Lock for frameless window screen tensioning devices



Oct. 2, 1951 JENSEN 2 ,570,128

LOCK FOR FRAMELESS WINDOW SCREEN TENSIONING DEVICES Filed Sept. 29, 1950 2 Sheets-Sheet l INVENTOR .Ta ck .7.Jens en ATTORNEYS J. H. JENSEN Oct. 2, 1951 LOCK FOR FRAMELESS WINDOW SCREEN TENSIONING DEVICES Filed Sept. 29, 1950 2 Sheets-Sheet 2 manna III!!! fir/II!.IIIIIIIIIIIIIIIII I INVENTOR Jack JziJensen ATTORNEYS Patented Oct. 2, 1951 LooK FOR FRAMELESS WINDOW SCREEN TENSIONING DEVICES Jack H. Jensen, San Leandro; Califl, assignoi' to Ry-Lock Company; Ltd., San Leandro, Calif., a

corporation of California Application September 29, 1950, Serial Nil/187,531

1 Claim. 1

The present invention relates generally to a "hold-down and tensioning device for a frameless Window screen.

A major object of the invention is to provide a framel'ess window screen tensioning device which embodies a novel inside lock; 1. e. a lock adapted to be manipulated from inside the window.

Another important object of this invention is to provide a frameless window screen tension- "ing device lock which is strong; effective to pre- Vent opening of the screen from the outside;

and convenient to manipulate, from the inside,

part fixed relative to the window frame; it thus being possible for the screen to be opened from the outside andwithout authority. It is therefore the prime purpose of the present invention to provide an inside manipulated lock whereby the snap-engaged parts cannot be separated.

A further object of the invention is to provide a lock, for the purpose, which is especially adapted-but not limited-for use with a frameless window screen tensioning device which ineludes a horizontal U-shaped handle projecting inward-1y from the bottom cross bar,. with one end leg of said handle notched on top for snap engagement beneath a catch plate which projects laterally from the window frame; the lock being a locking tab pivotally mounted in connection with such olatch plate for manual swinging between an upwardly extending non-locking position clear of the handle, and a downwardly extending locking position projecting into said handle.

Still another object of the invention is to provide a lock for frameless window screen tensioning devices which is designed for ease and economy of manufacture.

Still a further object of the invention is to provide a practical and reliable lock for frameless window screen tensioning devices, and yet one which will be exceedingly eiiective for the purpose for which it is designed.

These objects are accomplished by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

In the drawings:

Fig. 1 is a fragmentary inside elevation of a Window having a frameless window screen thereon and fitted with screen tensioning devices embodying the present invention.

Fig. 2 is a cross section on line 22 of: Fig. 1, showing the related lock? in its upwardly extendingoi! non-locking position.

Fig. 3 is a similar. view, but shows the lock. in its downwardly extending or locked position.

Referring now more particularly to the characters of reference on the drawings, the numeral I indicates generally, a nameless window screen; the screen being" mounted in connection with. a window casaindioated generally at 2', whichcase includes a header 3, a sill 4, and jambs 5.

At its upper end" the frameless'window screen I' is attached to a transverse top bar 6, which in turn is secured to the header 3 by brackets I' At its lower end, which is adjacent'but short of the sill 4. the screen I is attached to a transverse bottom bar a which includes a vertically adjustable closure strip 9, the latter assuring of complete closure with the sill 4 after the screen I is tensioned.

The" frameless windowscreen I" is maintained in taut, hold down relation by a air of tensioning devices, each indicated generally at I0, and

disposed at opposite ends of the transverse bot- As the tension'ing devices It, together with thehereinafterdesoribed lock incorporated therein, are identical, except for being right and left hand, a description of one will suffice for both.

A horizontal elongated handle II of U-s'hap'e is affixed to the transverse bottom bar 8 and extends inwardly therefrom, serving as the instrumentality whereby said transverse bottom bar 8 may be pulled inwardly until it strikes the related jambs 5.

A fiat, vertically adjustable bracket plate I2 is afiixed to the adjacent jamb 5 by vertically slotting said plate, as at I3, with a headed screw I4 extending through such slot into the: jamb.

Additionally, the bracket plate I2 is further stabilized, and adjusted, by means of a vertical headed screw I5 which extends through a foot IE, on the lower end of said plate I2, into sill 4.

With this arrangement the bracket plate I2 is effectively yet adjustably secured in connection with the jamb 5.

The handle I I includes end legs I1, and the one of such legs adjacent the jamb 5 is notched on top, as at I8, whereby when the handle I I is pulled inwardly to abut the screen 2 and the transverse bottom bar 8 against the corresponding jamb 5, such one end leg rides under a lateral catch plate I9 which extends in integral reation from the bracket plate l2. The lower edge of the catch plate I9 is formed with an inturned lip 20 and such lipped lower edge snapengages into the notch 18 when the handle is pulled inwardly, as above. The bracket plate I2 is set in an adjusted position such that the screen I is tensioned when such snap-engagement of the foregoing parts occurs.

While the above described device is effective for tensioning the window screen I, nevertheless it is possible-in the absence of a lockfor the transverse bottombar 8 to be pulled or pried outwardly, disengaging the handle H from the catch plate l9, thus permitting of unauthorized opening of the screen. 7

To avoid this eventuality. the tensioning device is provided with the following look:

A flat rotary base 2| is engaged flush against the inner face of the catch plate 19, being turnably secured in connection therewith'by a headed rivet 22.

In offset relation to the rivet 22 the rotary base 2| is formed with an integral, vertically elongated locking tab 23 which projects inward- 1y; i. e. in a direction away from the screen.

The elongation and disposition of the locking tab 23 is such that when the base 2| is in one rotary position, said tab extends upwardly clear .of the handle H, but in another position the tab extends downwardly, projecting through the handle in bearing relation thereagainst; the point of contact being indicated at 24. These positions of the locking tab 23 are shown, in Fig. 1, in the left hand and right hand devices, respectively.

With the described lock it require only a simple manipulation, from inside the window, to turn the locking tab 23 from its upwardly extending, non-locking position, to its downwardly extending locking position projecting through the handle I I in engagement therewith.

A portion of the locking tab 23 adjacent the screen I is cut away, as at 25, to permit said tab to clear the lipped lower edge of the catch verse bottom bar 8.

From the foregoing description it will be readily seen that there has been produced such a look as will substantially fulfill the objects of the invention, as set forth herein.

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claim.

Having thus described the invention, the following i claimed as new and useful, and upon which Letters Patent are desired:

A tensioning and locking device for a frameless window screen having a transverse bottom bar adapted to extend across a window case, and a manipulating handle on the bottom bar comprising a leg rigid with and projecting horizontally inward from the bar, and a member extending lengthwise of the bar from the inner end of said leg; said tensioningand locking device comprising a vertical plate secured on and extending laterally from the window case to overhang said handle leg, the latter having an angular notch cut in its upper surface adjacent the bottom bar, and the lower edge of the plate being formed with an up-turned angular lip to engage in said notch when the screen is tensioned, and a locking member comprising a base element disposed flatly against and pivoted on the plate above the lip, and an elongated finger tab projecting inwardly from the base and terminating at one end at one edge of the base, the tab being of a width and positioned to fit between the longitudinal handle member and the lip when the latter is engaged in the notch whereby if the base is turned to dispose the tab down it will project between said longitudinal handle member and the vertical plate to prevent outward movement of said member and the bottom bar of the screen; and when the tab is turned up from said position it will clear the handle to allow of release of the handle leg from the lip and outward move ment of said handle and bottom bar.

JACK H. JENSEN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,120,333 Pinkham Dec. 8, 1914 1,471,609 Jorgensen Oct. 23, 1923 1,633,645 Molberg June 28, 1937 2,146,251 Dominick Feb. '7, 1939 

